Abstract
For the purpose of realizing a bandwidth reservation mechanism on LAN, we earlier proposed a resource reservation type data transfer protocol that maps data reserved by Resource ReSerVation Protocol (RSVP) onto the synchronous bandwidth of Timed Token Protocol (TTP), which is the MAC protocol of FDDI, and evaluated its Quality of Service (QoS) by simulations on a LAN model where reserved data from the upper layer arrive at LAN nodes with a Poisson distribution. By simulations, we confirmed the effectiveness of the bandwidth reservation mechanism by showing that the data transmission rate of reserved data stays 100% within the reserved bandwidth. The protocol, however, had no function to process excess data that arrive at LAN nodes earlier than the timing determined by the reserved bandwidth. As a result, the data transmission delay time of reserved data increased greatly when the average load of reserved data was close to the reserved bandwidth. In this paper, we study several methods for processing the excess data to solve the above-mentioned problem and propose another resource reservation-type data transfer protocol that provides high QoS for reserved data using one of the methods. We also evaluate the effectiveness of the protocol by simulations. © 2000 Scripta Technica, Electron Comm Jpn Pt 1, 84(3): 1–11, 2001
Published Version
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